Pressure creating apparatus



Dec. 30, 1941. R. c. GROLL PRESSURE CREATING APPARATUS Filed Oct. 18, 1939 INVENTOR 1%Kfi6M ATTORNEY.

Patented Dec. 30, 1941 UNITED STATES PATENT OFFICE PRESSURE CREATING. APPARATUS Robert C. Groll, Springfield, Mass. v Application October 18, 1939,-Serial No. 300,008

1 Claim.

This invention relates to improvements in pressure creating apparatus.

It is a principal object of the invention to provide a pressure creating apparatus which is more simple in form than other devices of the type yet is capable of operating with great efiiciency and a minimum of friction. As will appear, the apparatus has but few parts and they may be compactly arranged so as to occupy but a small space yet great pressures may be built up.

It is still another object of the invention to provide apparatus for creating pressure which may be utilized for any desired purpose. That is to say, the pressure may be used to form refrigerants or for any operation which requires the employment of pressure.

Still another object of the invention is the provision of a pressure creating apparatus which employs a liquid such as oil and a fluid such as air and the arrangement is such that the oil continuously circulates through the apparatus when it is in operation for lubricating and cooling functions while the air is compressed to create the pressure.

Various other novel features and advantages of the invention will be hereinafter more fully referred to in connection with the accompanying description of the preferred form of the invention, referenc being had to the drawing, wherein:

Fig. 1 is a side elevational view of an apparatus embodying the features of the invention; and

Fig. 2 is a sectional view on the line 2-2 of Fig. 1.

Referring to the drawing more in detail, the invention will be fully described.

In Fig. 1 there is shown an electric motor M having any desired horsepower. This motor drives a shaft 2 which preferably carries a flywheel such as 4. The whole apparatus is preferably mounted on a base 5.

The shaft 2 extends into a casing 6 which encloses a rotor 8, which is adapted to rotate with the shaft 2. The rotor may be variously shaped but its periphery must be formed to provide a plurality of pockets within the casing, such as [0, l, and I0" shown.

The casing has an inlet port I2 for air, gas or the like. A wiper such as M shown is provided within the casing and this has one end pivoted to the casing so that its free end may follow the irregularly shaped surface of the rotating member 8.

A tank l6 has a means of connection such as a pipe 18 with an outlet port in the rotor casing.

The rotor 8 rotates in the direction of the arrow and the wiper I4 is above the said outlet in the casing.

A coil or other tubular member 20 connects the lower side of the tank {6 and a port in the casing 6 approximately opposite the inlet l2, In the upper side of the tank [6, above the connection '8. s an, outle port 22 a apted to be suitab connected to whatever device is to be supplied with the pressure.

Sufficientliquid, preferably oil, is placed, in the tank to fill the same up to about the level of the connection l8 and also the coil and that one of the pockets, such as H), which is in communication with port 20.

The operation of the apparatus will now be described.

The motor M drives the shaft 2 and causes the rotor 8 to rotate so that each of its various pockets successively pass inlet l2, the port in the casing which is in communication with coil 20, and the port in the casing which is in communication with connection I8. Air is caused to be sucked in inlet 12 and as the rotor rotates the air in pocket l0 passes port 20 and eventually reaches pipe I8 through which it goes into the tank l6.

Oil in pocket l0 also goes through pipe [8 into the tank when pocket gets opposite the same. As the rotor continues to rotate the wiper I4 wipes the oil out of the pocket so that it is free to receive air from inlet l2.

It will be obvious that the oil constantly circulates from the tank through the coil into the rotor and back into the tank again. The forcing of oil into the air-containing pockets of the rotor, of course, compresses the air or gas so that pressure is built up in the tank and this pressure not only serves to force the oil back through the coil but also is capable of being utilized by virtue of outlet 22.

As stated, and shown, it is preferable that the air inlet I2 and liquid inlet 20 of the rotor casing be disposed approximately opposite one another.

It is desired to here point out that the oil circulating through the coil 20 not only may be used to drive a desired apparatus, since the oil is under pressure, but also the heat therefrom may be utilized for any desired purpose. Further, there may be created a difference between the temperature of the coil and the temperature of the rest of the apparatus by some outside means such as by sunlight and by cooling the coil, which difference in temperature will bring about power return.

It should further be stated that the wiper may take any form and is preferably so arranged as to operate with a rocking motion. Thus the power which is required to move the wiper in one direction is equal to the power returned to the rotor by the back pressure wherefore there is a minimum of friction.

It will be obvious that the member 8 may take various forms and could be a piston, gear, or suitable valve, as well as a rotor, it only being necessary that some means be provided to create pressure or a vacuum.

While I have described the invention in great detail and with respect to the present preferred form thereof, it is not desired to be limited thereto since changes and modifications maybe made therein without departing from the spirit and scope of the invention. The invention may be embodied in other specific forms without departing from the essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicat'edby the appended claim rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the United States is:

Pressure-creating apparatus of the class described comprising in combination, a casing having rotatable therein a substantially triangular rotor having three spaced-apart portions of its peripheral surface spaced from the inner wall of said casing and the remainder of its said peripheral surface contacting said inner wall so as to provide three separate and spaced chambers within the casing, said casing being provided with a gas inlet which leads into one of said chambers and a liquid inlet which leads into another of said chambers and an outlet port which leads out of the remaining chamber and is located intermediate said inlets, means for rotating said rotor, yieldable means within said remaining chamber and continuously contacting said peripheral surface of the rotor, a tank disposed adjacent said casing and provided with an inlet in its upper portion and an outlet in its lower ROBERT C. GROLL. 

